It looks like some kind of pest but I don't see anything on the leaves, just slight browning and curling of the top. If anyone recognise this, please advise what to do to remedy.
I've ordered some epsom salts in case it is lack of Mg, I've been occasionally spraying with dishsoap and neem oil. I've also fed the plants with my comphrey and nettle tea and some seaweed plant food. I haven't over used the feed, maybe once a week gave them a little.
Anybody knows what it is please?